@article{RCM_1967__1_181550,
     author = {Rolando E. Peinado},
     title = {P-ancestralidad en ciertos anillos},
     journal = {Revista colombiana de matematicas},
     pages = {33--45},
     publisher = {mathdoc},
     volume = {1},
     year = {1967},
     url = {http://geodesic.mathdoc.fr/item/RCM_1967__1_181550/}
}